ICR relay inspection (RZ4E-TC)

1. ICR relay inspection

1. Visual inspection

1) Inspect the ICR relay for the following.

  • Cracking
  • Damage

Note

  • Replace the ICR relay if a malfunction is found.

2. Output inspection

1) Referring to the diagram, connect the inspection wiring to the ICR relay.

Caution

  • Do not mistake the connection position of the wiring.

Legend

  1. M-terminal
  2. S-terminal
  3. B-terminal
  4. Rated voltage (Positive side)
  5. Rated voltage (Negative side)
  6. Rated current (Positive side)
  7. Rated current (Negative side)

2) Inspect the output waveforms between the B-terminal and the M-terminal, and the S-terminal of the ICR relay using an oscilloscope when the following conditions are met.

  • Energize current between the B-terminal and the M-terminal.
  • Apply voltage to between the S-terminal and the ground.

Standard: 50 A Rated current

Standard: 12 V Rated voltage

Caution

  • Current energization and voltage application should be stopped within 5 seconds.

Standard: 0.45 to 0.55 V Voltage 1

Standard: 0.05 V or less Voltage 2

Standard: 5 A or less Current 1

Standard value: 108 to 132 ms Time 1

Voltage between B-terminal and M-terminal

Legend

  1. Current between B-terminal and M-terminal (50 A)
  2. S-terminal voltage (12 V)
  3. Voltage between B-terminal and M-terminal
  4. Voltage 1
  5. Voltage 2
  6. Time 1

S-terminal current

Legend

  1. Current between B-terminal and M-terminal (50 A)
  2. S-terminal voltage (12 V)
  3. S-terminal current
  4. Current 1
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